[MPlayer-users] bitrate ignored with lavcodec

[marcogi at libero.it]

,

I,m try to converting mpeg2 captured video to mpeg4 using mencoder (09042002 cvs).
I use 3-pass mode:

rm frameno.avi
cat mpeg2files*.mp2|mencoder -ovc frameno -lameopts abr:br=112 -o frameno.avi -
cat mpeg2files*.mp2|mencoder -v -oac copy -vop pp,scale=352:264 -npp tn:100:200:1000 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=570:vpass=1 -o /dev/null -
cat mpeg2files*.mp2|mencoder -v -oac copy -vop pp,scale=352:264 -npp tn:100:200:1000 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=570:vpass=2 -o mpeg4file.avi -

I get a low bitrate mpeg4 video (about 340-400 Kbit/sec) indipendently bitrate I set.
Using vbitrate=700 I got aproxymately same file size and bitrate.
I made many tests using various bitrates and even using vhq and/or v4mv options, but problem was still present.